HP XP P9000 RAID Manager Reference Guide (T1610-96061, January 2014)

DescriptionOption
-gs <group>: This 's' option is used when specifying a group name for cascading SVOL (defined
in the configuration definition file). The command is executed for the specified group unless the -ds
<pair Vol> option shown below is specified.
-ds <pair Vol>: The following options can be specified for cascading S-VOL.
-d[g]s <raw_device> [MU#] ...
-d[g]s <seq#> <LDEV#> [MU#]
Continuous Access Synchronous Async and Continuous Access Journal only.-cto <o-time>
[c-time] [r-time]
These options are valid for only Continuous Access Synchronous Async/Continuous Access Journal.
If you specify '-cto <o-time> [c-time] [r-time]' option on Continuous Access Synchronous Sync, it is
ignored.
o-time:
This option is used when setting 'offloading timer' for controlling inflow of write I/O to the specified
CT group.
For Continuous Access Synchronous Async o-time must be specified within the limits of 255 from
1, in units of sec as value. If this option is not specified, then '90' seconds is set as default.
For Continuous Access Journal, o-time must be specified within the limits of 600 from 1, in units of
sec as value. If this option is not specified, then '60' seconds is set as default.
If 'o-time=0' is specified, the inflow of write I/O becomes invalid.
If Sidefile quantity is over limit of Sidefile Area then host side Write I/O is waited for enough space
of Sidefile when storing next new write data until this timeout value (1 second to 255(600) seconds).
Default timeout value are 90(60)seconds. If the timeout happens with this waiting state, then the
pair state is changed from 'PAIR' to 'PSUS' state of sidefile (Journal) Full, and its host side Write
I/O is continued and Writing data is managed by BITMAP mode.
Therefore o-time timeout value should have less a low value than I/O timeout value of the host
system
[c-time](Continuous Access Synchronous Async only): This option is used when setting 'Copy Pending
timer' to the specified CT group. c-time must be specified within the limits of 15 from 1, in units of
minutes as value. If this option is not specified, then this value is set as below.
• If CT group is created, then sets 5 minutes as default, if not, it is not changed.
[r-time] (Continuous Access Synchronous Async only): This option is used when specifying 'RCU
Ready timer' to the specified CT group. r-time can be set from 1 to 10 minutes. If this option is not
specified, this value is set as follows:
• If CT group is created, then sets 5 minutes as default; if not, it is not changed.
Notes:
These options are invalid when pair-volume is added in CT group.
The propagation and persistence of these parameters are as follows.
For Continuous Access Synchronous Async, these parameters are also forwarded to the SVOL side
with the paircreate command, and are used when SVOL is changed to PVOL. These parameters
are maintained until the pair-volumes are changed to SMPL
For Continuous Access Journal, these parameters are maintained on each journal, therefore it must
be set respectively on both PVOL and SVOL side. For example, to change 30 seconds:
paircreate -g Cnt Ac-J -vr -f async -nocopy -jp 1 -js 1 -cto 30
pairsplit -g Cnt Ac-J -S
paircreate -g Cnt Ac-J -vl -f async -jp 1 -js 1 -cto 30
These parameters are maintained until the journal is broken.
Continuous Access Journal only.-nocsus
This option is used to create the suspended journal volumes without copying data in order to make
the delta-resync between DC2 (Sync-SVOL) and DC3 (Continuous Access Journal-SVOL).
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